Top 3 Haskell type-theory Projects

write-you-a-haskell

4 3,304 0.0 Haskell

Building a modern functional compiler from first principles. (http://dev.stephendiehl.com/fun/)

Project mention: A decade of developing a programming language | news.ycombinator.com | 2023-11-14

I highly recommend https://github.com/sdiehl/write-you-a-haskell as it is very developer friendly. It’s not complete, but it really gets the gears turning and will set you up for writing your own Hendley-Milner style type checker.

Agda

27 2,368 9.8 Haskell

Agda is a dependently typed programming language / interactive theorem prover.

Project mention: Types versus sets (and what about categories?) | news.ycombinator.com | 2023-08-31

This was recently deemed inappropriate:
"Bye bye Set"
"Set and Prop are removed as keywords"
https://github.com/agda/agda/pull/4629

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
cubicaltt

3 556 2.3 Haskell

Experimental implementation of Cubical Type Theory

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).